The fish you are describing is likely a ray. Rays are cartilaginous fish characterized by several distinct features.
Characteristics of Rays
- Flattened, disc-shaped bodies
- Large, wing-like pectoral fins fused to the head
- Cartilaginous skeletons, similar to sharks
Common Examples
- Stingrays: Known for venomous spines on their tails.
- Manta Rays: The largest rays, with wingspans up to 29 feet.
- Eagle Rays: Recognized by their long, narrow bodies and distinctive "wings."
Many species of rays exist, each with unique adaptations. If you have more details about a specific ray, further identification may be possible.